Cite
MLA Citation
L. Bruce Railsback et al.. “An optimized scheme of lettered marine isotope substages for the last 1.0 million years, and the climatostratigraphic nature of isotope stages and substages.” Quaternary science reviews, vol. 111, 2015, pp. 94–106. http://access.bl.uk/ark:/81055/vdc_100042507703.0x000042